污泥制备陶粒及其性能研究  

Study on preparation of ceramsites with sludge and its performance

作　　者：余锋波 金文杰[1] 聂振皓 

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114051 [2]鞍山市环保局,辽宁鞍山114009

出　　处：《辽宁科技大学学报》2017年第4期274-280,共7页Journal of University of Science and Technology Liaoning

基　　金：辽宁省教育厅先进煤焦化及煤资源高效利用工程研究中心开放课题

摘　　要：采用鞍山市大孤山污水处理厂城市污泥和鞍山市千山山脉的黏土为主要原料制备陶粒。采用X射线衍射法和原子吸收法测定城市污泥和黏土的成分,主要含有Si O2和Al2O3;通过正交实验得到了城市污泥和黏土制备陶粒的最佳配方,配方是城市污泥与黏土比为3:1,烧结温度为1 000℃,保温时间为30 min,添加剂为15%;测定了陶粒的吸水率、表观密度和侵蚀率,得到了吸水率和表观密度成正相关,粒径为5 mm侵蚀率最小,30 h的侵蚀率是0.17%。将粒径为2、5和7 mm陶粒应用于焦化废水,研究了陶粒表面微生物附着效果;通过三组对比实验可知,同时加入污泥和陶粒处理焦化废水的效果最好,焦化废水COD从637.4 mg/L降到40.3 mg/L,只加入陶粒处理焦化废水最差,焦化废水COD从637.4 mg/L降到128.9 mg/L。In this study,the main raw materials used to make ceramsitescame were come from the municipal sludge of Dagushan sewage treatment plantin Anshan and clay of Qianshan mountainsin Anshan. The composition of the municipal sludge and the clay were detected by X-ray diffraction and atomic absorption spectrometry. It mainly contains Silica and Aluminum oxide. The optimum formulation of the municipal sludge and the clay was obtained by orthogonal experiment,i.e. the ratio of 3 of urban sludge to 1 of clay. The sintering temperature is 1 000 °C,and soaking time,30 min by the additive of 15%;Water absorbing capacity,apparent density and erosion rate of ceramsites were determinated. There was positive correlation between water absorbing capacity and apparent density. The smallest erosion rate was 0.17% for 5 mm of ceramsites in 30 h of soaking in water;The particles with size of 2 mm,5 mm and 7 mm were respectively applied to treat coking waste water and studied the effect of microbial attachment on the surface of ceramsites. Three groups of comparative experiments showed that sludge and ceramsites were added into coking waste water at the same time. The removal effect of COD was the best,which was reduced from 637.4 mg/L down to 40.28 mg/L,while the sole addition of ceramsites was the worst from 637.4 mg/Lto 128.9 mg/L for COD.

关 键 词：城市污泥 黏土 陶粒 焦化废水 

分 类 号：X703.1[环境科学与工程—环境工程]